Machine for edge-trimming irregular surfaces in boards



Sept. 9, 1958 s. E. HUGHES 2,851,070

MACHINE FOR EDGE-TRIMMING IRREGULAR SURFACES IN BOARDS Filed July 19,1957 2 Sheets-Sheet 1 INVENTOR SAMUEL E. HUGHES ATTORNEY Sept. 9, 1958s. E. HUGHES 2,8

MACHINE FOR EDGE-TRIMMING IRREGULAR SURFACES IN BOARDS Filed July 19,1957 2 Sheets-Sheet 2 23 gt- 5p I6 23 v 0 u 8 9 6 A lo I A v I I 9 38 o[2 a Z Y i s 3/ 3o /4 3 LL 29 4 7 29 J 9 a 51 $5 I v I \H 52 36 mINVENTOR SAMUEL E. HUGHES YATT E United States Patent 6 MACHINE FOREDGE-TRHVIMING IRREGULAR SURFACES 1N BOARDS Samuel E. Hughes, Burnaby,British Columbia, Canada Application July 19, 1957, Serial No. 672,969

1 Claims. or. 144-117 My invention relates to improvements in rusticsiding edge trimming machines.

The object of the'devi-ce is to provide means for trimming and bevelingthe lower edge of a length of siding to an irregular line, such as thatof a board cut from a log wherein the lower edge of the board is aportion of the original outer face of the log or the cambium layer.

'In order to present a most pleasing efiect to such siding it isdesirable first to use knotty pine or other wood species where tightknots are visible, second to so trim the wood that no knot close to thelower edge of the board shall be cut into but to be able to leave amargin of natural wood between any knot and the said lower edge of saidboard.

A further object is to provide operable means whereby the line out alongthe lower edge can be varied at will to suit the knot disposition ineach board and also to suit the desires of the operator.

The invention will be more fully described in the followingspecification and shown in the accompanying drawings, in which:

Figure 1 is a plan view of the invention.

Figure 2 is a longitudinal elevation.

Figure 3 is a transverse section taken on the line 3- of Figure 1.

Figure 4 is a transvesre section taken on the line 4-.4 of Figure 2.

Figure 5 is a perspective view of a length of beveled siding having alower edge trimmed by the trimming machine.

In the drawings like characters of reference indicate correspondingpartsin each figure.

The numeral 1 indicates generally a frame having front legs 2 and rearlegs 3. The legs are connemted together to form a base frame 5 and anupper frame 6. On the upper frame 6 two spaced sets of bed rol-lsrespectively indicated by the numeral 8 are provided, the rolls of eachset being :fitted on shafts 9 which are collectively coupled by chains10 and are severally driven by a drive chain 11 from the reduction gear12 of a motor 14. Mounted directly above the bed roll sets 8 are twospaced frames 16 which are connected together at the front by ahorizontal angle iron 17 and are hingedly coupled to a pair of forwardlyand upwardly extending brackets 19 by floating links 20.

Press rolls 22 are journaled in the frames 16 and are operativelycoupled together by chain and sprocket drives 23. The press rolls 22 areprimarily driven from one of the shafts 9 by a chain and sprocket drive24 to a shaft 25 which is provided with a flexible shaft portion 26,which allows the press rolls to rise and fall and assume such an anglefrom the horizontal as to allow siding which has parallel sides, orbeveled siding of any particular bevel angle to be held down upon thebed rolls and conveyed lengthwise of the frame without slippage. A fence28 extends lengthwise of the upper frame 6 and is slidably engaged bythe front edge of the siding as said siding is being conveyed throughthe machine by the rolls.

A pair of transverse members 29, see Figure 4, support a bed plate 30having inverted V-guides 31, and

2,851,070 Patented Sept. 9', 1958 ICC siding lengths fed between the bedrolls 8 and the press rolls 22.

The traverse member 32 is provided with a depending nut 42 and the bedplate 30 is provided with an apertured lug 43 in which a feed screw 44is rotatably journalled and collars 46 are fitted on the feed screw toprevent any endwise movement of said screw. The feed screw is fitted atits outer end with a hand wheel 47 by which the traverse member 32 andits motor may be moved transversely to adjust the cutter 40 generally todifferent widths of siding lengths.

A forked bracket 50 projects forwardly of the frame 1 and insaid bracketis an upstanding hand lever 51 having at its lower end a fork '52.

A lug 54 is mounted near the lower edge of the cradle 36 and pivotallyconnected to said lug is a pull rod 55 which is internally threaded atits outer end and is fitted with an elongated screw extension 56. Thethreaded extension 56 is fitted with a stop collar 57 and extendsthrough a trunnion nut 58 which is engaged by the fork 52 of the handlever 51. The extreme outer end of the screw extension is non-rotatablyfitted with a hand knob 59 by which the screw may be advanced into orretracted from the pull rod 55, and between said knob and the trunnionnut 58 a nut 60 is provided for the purpose of locking the threadedextension against rotation in the trunnion nut and in the pull rod 55.

In operation, the operator sits facing the machine where he can see thecutter head 40 and the interspace between the inner pair of press rolls22. Lengths of siding are progressively fed between the bed rolls 8 andthe press rolls 22 which are switched on to run continuously. Thesiding, if beveled, is so placed that its broad or bottom edge is facingthe cutter 40 and the operator will, by manipulating the handlever 51,draw the cutter to engage the adjacent edge of the board and cause saidedge to become irregular and assume the appearance of a board cut from alog in which one edge of said board was as the natural line of the log.As the depth of the cut by the cutter 40 is increased, the motor shaft39 will swing in a vertical plane and increase the angle of the bevelformed by the cutter.

-In use the operator will normally watch closely the disposition of anyknots in a board and where a knot is close to the edge to be trimmed hewill cause the cutter to skirt around the knot as indicated at X inFigure 5, thus adding materially to the artistic appearance of thefinished product.

If wide boards are to be treated, it may be desirable to move the motor38 and its cutter 40 rearwardly by manipulation of the hand wheel 47 andthe feed screw 44 and to readjust the position of the threaded extension56 of the pull rod 55 to dispose the hand lever 51 in a suitableposition for convenient use.

Obviously if narrow boards are to be trimmed the above adjustmentmovements would be reversed.

What I claim as my invention is:

1. An edge trimming woodworking machine comprising a frame having a bedfor receiving a board to be trimmed, means for moving the board alongthe bed, a motor having a vertical shaft mounted below the bed, a cutterupon the motor shaft, said motor being mounted for free swingingmovement below the bed to present the cutter to an edge of the board asit is moved lengthwise through the machine, and manual means forinstantly and 3 selectively rocking the motor to cause engagement of theboard by the cutter.

2. An edge trimming woodworking machine as claimed in claim 1 whereinthe motor is mounted on a traverse member movable within the frame andmeans are provided for moving said transverse -member transversely ofsaid frame whereby its rocking movement is confined to diflferentdesired transverse positions to trim boards of any desired widths.

3. An edge trimming woodworking machine comprising a frame, bed andpress roll means mounted on the frame for moving a board to be trimmedlengthwise of said frame, a traverse member mounted withinthe frame, amotor having a trunnion mounted upon the traverse member, said motorhaving a shaft and a cutter thereon, a manually operable lever swingablymounted on a part of the frame, a pull rod extending between the motorand the lever, said lever serving to rock the motor and move the cutterinto and out of engagement with an edge of the board to trim it.

4. An edge trimming woodworking machine as claimed in claim 3 whereinthe motor is capable of being moved transversely of the frame todifferent operating positions and said pull rod is extensible to leavethe mounting of the manually operable lever in its normalswingable'position regardless of the position of said motor transverselyof the frame.

5. An edge trimming woodworking machine as claimed in claim 3, whereinthe pull rod includes a threaded extension member threadedly engagingthe pull rod to effect a desired change in theoperating length ofthepull rod.

6. An edge trimming woodworking machine as claimed in claim 1, whereinthe bed upon which the board is adapted to be fed is provided with aplurality of bed rolls and a plurality of press rolls, said bed rollsand press rolls being driven by mechanical means and at least one ofsaid I press rolls being driven through a flexible shaft.

7. Anedge trimming woodworking machine as claimed in claim 1, whereinthe bed upon which the board is adapted to be fed is provided with aplurality of bed rolls and a plurality of press rolls, said bed andpress rolls being driven by mechanical means, said press rolls beingpivotally mounted at one end to swing in a vertical plane and at leastone of said'press rolls being driven through a flexible shaft.

References Cited in the file of this patent UNITED STATES PATENTS

